@media (max-width:359px){
    html{
        font-size: 20px;
    }
}
@media (min-width:360px) and (max-width:500px){
    html{
        font-size: 25px;
    }
}
@media (min-width:501px){
    html{
        font-size: 30px;
    }
}
body{
    margin: 0;
    padding: 0;
    background-image: url(../images/background0.jpg);
    /*background-repeat: no-repeat;*/
    background-attachment:fixed
}
nav,table,tr,td{
    margin: 0;
    padding: 0;
}
nav{
    width: 100vw;
    background-color: #fff;
    box-shadow: 1px 1px 1px black;
    position: fixed;
    bottom: 0;
    z-index: 100;
    /*border: 1px solid black;*/
}
table{
    width: 100%;
    border-collapse: collapse;
    /*border: 1px solid black;*/
}
tr{
    width: 100%;
    /*box-sizing: border-box;*/
}
td{
    line-height: 10vw;
    text-align: center;
    border: 1px solid black;
}
td:nth-child(1){
    width: 10vw;
}
td a{
    text-decoration: none;
    font-size: 0.6rem;
    color: black;
}

main{
    width: 95vw;
    height: 500px;
    margin: 10px auto;
    /*border: 1px solid red;*/
}
main a{
    color: black;
}
main:hover a{
    color: black;
}
main .father{
    width: 90vw;
    padding-bottom: 20px;
    margin: 10px auto;
    border-radius: 5px;
    background-color: #fff;
}
main .first{
    width: 80vw;
    position: relative;
}
.first section{
    margin: 20px auto 0;
    padding-bottom: 0;
    width: 75vw;
}
main img{
    width: 85vw;
    margin: 0;
    padding: 0;
    padding-top:10px;
}
main aside{
    margin: 0;
    padding: 0;
    width: 85vw;
    position: absolute;
    background-color: #000;
    opacity: 0.6;
    bottom: 0px;
    display: none;
    text-align: center;
}
main section:hover aside{
    display: block;
}
main p{
    margin: 0;
    padding: 0;
    line-height: 1.5rem;
    color: white;
}
.second{
    width: 85vw;
    margin: 10px auto;
    box-sizing: border-box;
    vertical-align: middle;
    
    /*border: 1px solid red;*/
}
.second span{
    display: inline-block;
    text-indent: 2em;
    width: 60vw;
    vertical-align: middle;
}
.second img{
    width: 20vw;
    display: inline-block;
    margin: 0;
    padding-top: 0;
    vertical-align: middle;

}